Pilot â Junior (Alex Koch) and the residents of ChesterâÂÂs Mill find themselves suddenly and inexplicably sealed off from the rest of the world by a massive transparent dome, on UNDER THE DOME premiering Monday, June 24 (10:00-11:00 PM, ET/PT) on the CBS Television Network. UNDER THE DOME is based on Stephen KingâÂÂs bestselling novel. Photo: Michael Tackett/é2013 CBS Broadcasting Inc.. All Rights Reserved.